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Hi there, I have a Glow Worm Micron 40FF boiler, fitted in 2003 in a new-build property. The unit is displaying a 'Software Error' LED Fault Coding (LED 1 (Reset) is on, LED 2 (Burner Lit) is slow flashing (2Hz)). I tried switching the unit off (Control Knob at '0', and Power off at...